<?php

$process = new swoole_process(function(\Swoole\Process $worker){
    sleep(3);
    //子进程逻辑
    //通过管道从主进程读取数据
    $cmd= $worker->read();
    ob_start();
    //执行外部程序并显示
    passthru($cmd);
    $ret = ob_get_clean() ?:'';
    $ret= trim($ret).". worker pid:".$worker->pid. "\n";
    $worker->write($ret);
    $worker->exit(0);
});
// 启动进程
$process->start();
// 从主进程将通过管道发送数据到子进程
$process->write('php --version');
// 从子进程读取返回数据并打印
$msg = $process->read();
echo 'result from worker: ' . $msg;